Figure 3From: Improving access to preparatory information for children undergoing general anaesthesia for tooth extraction and their families: study protocol for a Phase III randomized controlled trial Phase III RCT: flow diagram showing key measures at the GA dental visit. **90% power calculation measure. A-VAS, 10 cm Visual Analogue Scale at anaesthetic induction; GA, general anaesthetic; m-YPAS, modified Yale preoperative anxiety scale; RCT, randomized controlled trial; S-VAS, 10 cm Visual Analogue Scale used to score patient satisfaction.Back to article page